<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.min.js"></script>
		<script src="jquery.fullscreen.js" type="text/javascript" charset="utf-8"></script>
	</head>
	<body>
		<button id="btn">gg</button>
		<div id="ss"style="background-color: #000000;width: 500px;height: 500px;">
			
		</div>
		<script>
			$("#btn").click(function(){
				$("#ss").fullScreen(true);
			})
		</script>
	</body>
</html>
